appdata: specify project_group
Added shuffle callback and methods
Added shuffle to game over dialogue
Rephrase the no-moves dialog

Primarily, there's no time penalty for choosing Undo
Use a GtkHeaderBar

https://bugzilla.gnome.org/show_bug.cgi?id=722230
Updated Spanish translation
Changed GTK Requirement to 3.10 for GtkHeaderBar
Prepare 3.11.90
Updated Norwegian bokmål translation
Stop the timer when resetting the game

This fixes a spew of critical warnings when we attempt to use a null
clock in Game.timeout_cb()

https://bugzilla.gnome.org/show_bug.cgi?id=724389
Add Game.reset_clock()

Simplifies the implementation of Game.reset()
Ensure clock label is updated after Reset Game
Update the clock label when starting a new game
Disallow undo/redo after Restart Game
Just call restart_game() from restart_game_cb()

I *think* these can be the same.
Ensure game is unpaused after Restart Game
Updated Lithuanian translation
Fix direction of Play button in RTL layouts
Updated Czech translation
Updated Czech translation